Water-insoluble azo dyestuff and fiber dyed therewith



Patented Juiy ll, 1933 ii-stares at r Price NILHELM FITZKY, 0F FEANKFQBT-ODIQFHE-1VIAINHOGHST, GEJRJLLANY, ASSIGN OR TO GENERAL ANILINE NVORKS, 1110., OF NEW YORK, N. Y., A CORPORATION OF DELA.-

WARE

W'ATEB-INSO'LUBLE szo DYESEUFF annniniin .nynnj'rnnniiwiirn" I No Drawing. Application filed'iebruary 1%;1929, Serial lie. 340,023, and in Gerrnany February 18, 1928.

I have found that water-insoluble azo dye-F stuffs of especially good properties are obtained by coupling aldiazo eonipoundot the benzene series, containing at least one negative group, with the hitherto unknown 2.3-

hydronynaphthoyl 4; alkoxy l naphthylamines. The dyestuffs obtained thereby'are distinguished, besides by other good qualities by their remarkable itastness to light. They can be produced in substance or on the fiber.

T he following examples serve to illustrate my invention but are not intended to limit it thereto; p p

of boiled cotton yarn are treated for half an hour with the following ground ing liquor:

4.5 g. of hydroxynan]ithoylAdnothoXy-lmaphthylaniine 9 ccm. oi Turlre ed oil of 50 per cent. strength 13.5 ccm. of caustic soda solution 34 B., the whole made up to 1- liter Y 4.5 coin. of formaldehyde of 30 per cent strength.

The material is then thoroughly "freed from Water by centrifuging or squeezing lt and subsequently treated for hall an hour 111 the following dye bath:

of -lniiro 2-luethol L68 g. -anilnohenzene are diazotizcd in 13C. and

itriiei 'llzoro are added sodium a neutral reaction towards Congo paper and l of sodium chloride; the whole is made up to 1 liter The material is subsequently washed,

soap and 3 g. of sodium carbonate per -liter and finally washed again and drled. The dyestufi has the. following formula:

and yields a beautiful garnet dyeing of'e'xcellent fastness to light. o y 7 (2) 50' g. of boiled cotton yarn are treated with the groundingliquid described in Example -l and dyed in the following dye bath:

1.42 g. "of 4-chloro-2-amino-1-rnethylbenzenc are diazotized in known'manner with 2. 6 com. of hydrochloric acid 22 B. and t 0. g. of dissolved sodium nitrite while cooling with ice. There are added sodium acetate until there is a neutral reaction towards Congo paper and J 25 g. of sodium chloride; the whole is made up to 1 liter 7 v Thus a claret red dyeing is obtained of good fastness to light and kier-boiling;

(3) The diazo compound obtainable in the- I usual manner fro1n 16.8 parts of .t-nitrO-Q- nrethoxy-l-aminobenzene is run, while th0r oughly stirring, in an aqueous suspension of 36 parts "of 2.3hydroXynaphth'oyl-4L meth-' oxy-l-naphthyla1nine obtainable by dissolving the latter in diluted caustic soda solution and precipitating with diluted acetic acid. The dyestuif is precipitated in the form 0i bluish claret flakes. When the coupling is complete, it is filtered with suction and washed in a neutral solution." The dyestufi has the formula shown in Example 1.

Tobie of other combinations lDinzo compound of the base i I Grounding liquor Shade 2.5-dichloro-l-aininohenzene 2.3-hydroxynaphthoyl l mcthoxy-Y-naphthylamlne Rcddish brown. S-ClllOlOQ-dnllHOLHKElLhYlDBHZGIIB G r v I claim: 1. As new products the water-insoluble azo dyestuffs of the following'general formula:

wherein the phenyl residue must contain at least one halogen or a nitro group which dyestuffs yield reddish-brown t-o garnet dyeings of a remarkable fastness to light.

, 2. As new products the water-insoluble azo dyestuffs of the following formula:

OCH;

wherein the phenyl residue must contain at least one halogen or a nitro group which dyestuffs yield reddish-brown to garnet dyeings of aremarkable fastness to light.

3. As new products the water-insoluble azo dyestuffs 0f the following formula: 1

wherein X-and Y stand for the substituents CH OCH N0 Cl, it being necessary that in one of the positions X or Y there stands always N0 or Cl, which dyestuffs yield reddish-brown to garnet dyeings of remarkable fastness to light. i

4:. As new products the water-insoluble azo dyestuffs of the following formula wherein X and Y stand for the substituents CH OCH ,NO Cl, it being necessary that 1n one of the positions X or Y there stands always N0 or Cl, which dyestuffs yield reddish-brown to garnet dyoings of a remark able fastness to light.

5. As a new product the water-insoluble azo dyestufl' of the following formula:

OCHs

OCH3

which yields, when produced on the fiber, a beautiful garnet of great fastness to light and which forms, when produced in substance and dried, a bluish-claret powder.

6. As new products, the water-insoluble azo dyestuffs of the following formula :Y

wherein X and Y stand for the substituents' CH CCl-L, N0 Cl, it being necessary that either X or Y means N0 or Cl which dyestuffs yieldreddish-brown dyeings of a remarkable fastness' to light.

8. As a new product, the water-insoluble azo dyestufl of the following formula which yields, when produced on the fiber, a

reddish green tint of greatfastness to light.

9. As a new product, the Water-insoluble azo 12. Fiber dyed With the azo dyestuffs 'claimed iii claim 3.

dycstufl' of the following formula:

which yields, when produced 011 the fiber a claimed in claim8.

claret tint of great fastness to light.

13. Fiber dyed With theaz o dyestufl s claimed in claim 4.

14. Fiber dyed with the azo dyes tiiff claimed in claim 5. I

15. Fiber dyed With the azo dyestuffs as claimed in claim 6. V v

16. Fiber 'dyed With the 2120 dyestuffs claimed in claim 7. V v

17. Fiber dyed with the am dyestufl" 18. Fiber dyed with the azo dyestufi' 10. Fiber dyed with the age dyestuiis asv claimed in claim 9.

claimed in claim 1. 11. Fiber dyed With the azo dye claimed in claim 2.

stuffs as WILHELM FITZKY. 

